Motivation:
When users receive "Maximum active streams violated for this endpoint"
exception, it's useful to know what is the current max streams limit on
HTTP/2 connection.
Modifications:
- Include current number of maximum active streams in exception message;
Result:
Easier debugging of HTTP/2 connections.
Motivation:
Exception logged by `onHttp2UnknownStreamError` is propagated to the
upper layers anyway. Receiver of the exception is responsible for
correct handling. Inside netty, it's enough to log at `DEBUG` level.
Modifications:
- `Http2FrameCodec#onHttp2UnknownStreamError` always logs at `DEBUG`
level;
Result:
Less noise in logs when `Http2UnknownStreamError` is properly handled by
upper layers.
Co-authored-by: Norman Maurer <norman_maurer@apple.com>
Co-authored-by: Chris Vest <mr.chrisvest@gmail.com>
Motivation:
Overspecifying interfaces can increase coupling and make refactoring harder down the line.
Modification:
Places that were specifying fields, variables, and return types as ScheduledFuture, but did not use any features specific to ScheduledFuture, have been changed to specify Future instead.
Result:
Cleaner code.
Motivation:
There is a memory leak while writing empty data frame with padding.
The empty data frame was occurred because we are running a proxy server
built by netty, and found that google services always sent data frames
followed by an empty data frame.
Modifications:
Calls the ctx.write even the payload is empty.
Result:
Fix memory leak.
Co-authored-by: Norman Maurer <norman_maurer@apple.com>
Motivation:
At present, the verification methods of `ZstdOptions` and `BrotliOptions` are not consistent, and the processing methods of `ZstdOptions` and `BrotliOptions` in `HttpContentCompressor` are also inconsistent.
The http2 module does not add zstd-jni dependency, so `ClassNotFoundException` may be thrown
Modification:
Added `Zstd.isAvailable()` check in `ZstdOptions` to be consistent, and added zstd-jni dependency in http2 module
Result:
The verification methods of `ZstdOptions` and `BrotliOptions` are consistent, and `ClassNotFoundException` will not be thrown
Signed-off-by: xingrufei <xingrufei@sogou-inc.com>
Motivation:
Opportunities for clean up found while working on a different PR.
Modification:
* Dead code has been removed.
* Unnecessary parenthesis, qualifiers, etc. removed.
* Unused imports removed.
* Override annotations added where missing.
Result:
Cleaner code
Motivation:
There are lots of redundant variable declarations which should be inlined to make good look better.
Modification:
Made variables inlined.
Result:
Less redundant variable and more readable code.
Motivation:
io.netty.http2.validateContentLength SystemProperty was added as a way
to opt-out for compabitility for libraries/applications that violated
the RFC's content-length matching requirements [1] but have not yet been
fixed. This SystemProperty has been around for a few months now and it
is assumed these issues have now been addressed in 3rd party code.
[1] https://tools.ietf.org/html/rfc7540#section-8.1.2.6
Modifications:
- Remove the io.netty.http2.validateContentLength SystemProperty,
preventing folks from opting out of RFC's required content-length
matching.
Result:
No more escape hatch in H2 for content-length matching enforcement.
Motivation:
We should make variables `final` which are not reinstated again in code to match the code style and makes the code look better.
Modification:
Made couples of variables as `final`.
Result:
Variables marked as `final`.
Motivation:
We should get rid of the unnecessary toString calls because they're redundant in nature.
Modification:
Removed unnecessary toString calls.
Result:
Better code
Motivation:
There are lots of imports which are unused. We should get rid of them to make the code look better,
Modification:
Removed unused imports.
Result:
No unused imports.
Motivation:
As suggested in [section 5.3.4 in http2 spec](https://datatracker.ietf.org/doc/html/rfc7540#section-5.3.4):
> When a stream is removed from the dependency tree, its dependencies can be moved to become dependent on the parent of the closed stream. The weights of new dependencies are recalculated by distributing the weight of the dependency of the closed stream proportionally based on the weights of its dependencies.
For example, we have stream A and B depend on connection stream with default weights (16), and stream C depends on A with max weight (256). When stream A was closed, we move stream C to become dependent on the connection stream, then we should distribute the weight of stream A to its children (only stream C), so the new weight of stream C will be 16. If we keep the weight of stream C unchanged, it will get more resource than stream B
Modification:
- distribute weight to its children when closing a stream
- add a unit test for the case above and fix other related unit tests
Result:
More spec-compliant and more appropriate stream reprioritization
Co-authored-by: Heng Zhang <zhangheng@imo.im>
Motivation:
We need to add `--add-exports java.base/sun.security.x509=ALL-UNNAMED` when running the tests for codec-http2 as some of the tests use SelfSignedCertificate.
Modifications:
- Add `--add-exports java.base/sun.security.x509=ALL-UNNAMED` when running the tests for codec-http2
- Ensure we export correct when running with JDK12, 13, 14 and 15 as well
Result:
No more tests failure due not be able to access classes
Motivation:
We did migrate all these modules to junit5 before but missed a few usages of junit4
Modifications:
Replace all junit4 imports by junit5 apis
Result:
Part of https://github.com/netty/netty/issues/10757
Motivation:
Currently, Netty only has BrotliDecoder which can decode Brotli encoded data. However, BrotliEncoder is missing which will encode normal data to Brotli encoded data.
Modification:
Added BrotliEncoder and CompressionOption
Result:
Fixes#6899.
Co-authored-by: Norman Maurer <norman_maurer@apple.com>
Motivation:
8c73dbe9bd did migrate the codec-http2 code to use junit5 but missed two classes.
Modifications:
Adjust the rest of codec-http2 tests to use junit5
Result:
Part of https://github.com/netty/netty/issues/10757
Motivation:
We should update to use junit5 in all modules.
Modifications:
Adjust codec-http2 tests to use junit5
Result:
Part of https://github.com/netty/netty/issues/10757
Motivation:
Incoming `Http2GoAwayFrame#lastStreamId()` tells what was the last
streamId that the remote peer takes for processing [1]. We fire a
userEvent for all streams above that value to let users know those are
safe to retry on another connection. There is no need to go through
`forEachActiveStream` if `lastStreamId == Integer.MAX_VALUE` because
none of the streams can have id greater that MAX_VALUE.
1. https://datatracker.ietf.org/doc/html/rfc7540#section-6.8
Modifications:
- Return fast from `onHttp2GoAwayFrame` in `Http2MultiplexCodec` and
`Http2MultiplexHandler` if `lastStreamId() == Integer.MAX_VALUE`;
Result:
No unnecessary iteration over active streams on GO_AWAY if
`lastStreamId() == Integer.MAX_VALUE`.
Motivation:
Netty lacks client side support for decompressing Brotli compressed response bodies.
Modification:
* Introduce optional dependency to brotli4j by @hyperxpro. It will be up to the user to provide the brotli4j libraries for the target platform in the classpath. brotli4j is currently available for Linux, OSX and Windows, all for x86 only.
* Introduce BrotliDecoder in codec module
* Plug it onto `HttpContentDecompressor` for HTTP/1 and `DelegatingDecompressorFrameListener` for HTTP/2
* Add test in `HttpContentDecoderTest`
* Add `BrotliDecoderTest` that doesn't extend `AbstractDecoderTest` that looks flaky
Result:
Netty now support decompressing Brotli compressed response bodies.
Motivation:
`Http2FrameCodecBuilder` defines static factory methods `forClient()`
and `forServer()` that should be used to create a new instance.
The default ctor is useful only when users need to override behavior
of the existing builder. Those users should define another way to create
an instance.
Modifications:
- Decrease visibility of `Http2FrameCodecBuilder` default ctor from
`public` to `protected`;
- Add javadoc to clarity responsibilities;
Result:
Users of `Http2FrameCodecBuilder` are not confused why
`new Http2FrameCodecBuilder().build()` works for the server-side, but
does not work for the client-side.
Motivation:
#11210 fixed a regression caused by #11156. This change adds a unit test for it.
Modifications:
- Add test
Result:
Verify fix in #11210
Co-authored-by: Norman Maurer <norman_maurer@apple.com>
__Motivation__
`Http2FrameCodecBuilder` constructor calls `server()` internally which disallows using certain methods on the builder later. Additionally, the constructor is package private which limits extension of the `Builder` as well as usage outside the available `forClient()` and `forServer()` static methods.
__Modification__
- Introduce a `public` no-arg constructor to `Http2FrameCodecBuilder`.
__Result__
`Http2FrameCodecBuilder` can now be used to create the codec with `Http2Connection` or `Http2ConnectionDecoder` and `Http2ConnectionEncoder` which was earlier not possible due to implicit call to `server()` by the `Http2FrameCodecBuilder` constructor.
Motivation:
RFC 8411 defines a new HTTP/2 pseudo header called `:protocol`:
- https://datatracker.ietf.org/doc/rfc8441/
Netty currently raises an exception when validating an `Http2Headers`.
Modifications:
- Added `Http2Headers.PseudoHeaderNames.PROTOCOL` so that `:protocol`
pseudo header is not rejected.
Result:
- A user can implement WebSockets with HTTP/2.
Motivation:
NullChecks resulting in a NullPointerException or IllegalArgumentException, numeric ranges (>0, >=0) checks, not empty strings/arrays checks must never be anonymous but with the parameter or variable name which is checked. They must be specific and should not be done with an "OR-Logic" (if a == null || b == null) throw new NullPointerEx.
Modifications:
* import static relevant checks
* Replace manual checks with ObjectUtil methods
Result:
All checks needed are done with ObjectUtil, some exception texts are improved.
Fixes#11170
Motivation:
SimpleChannelPromiseAggregator implements the promise API and allows for
multiple operations to share a common promise. It currently propagates
the last exception to occur, but this may mask the original exception
which lead to the last exception and make debugging more difficult.
Modifications:
- SimpleChannelPromiseAggregator propagates the first exception instead
of the last exception.
Result:
Fixes https://github.com/netty/netty/issues/11161.
Motivation:
In the method processHeaderState(), we have checked the http2 payload length against max frame size. But later for
different types of frames, we checked this again.
Modifications:
Removed the duplicate check in verify*() methods. And removed verifyPayloadLength() method, since it will not be used anymore.
Result:
Remove duplicate check and make the code cleaner.
Motivation: We have already calculated the payload length. So no need to calculate again when allocating ByteBuf
Modification: Used payloadLength variable instead of calculating the payload length again
Result: Re-use the variable value and make the code cleaner
Motivation:
There is a bug in `StreamBufferingEncoder` such that when client receives GOWAY while there are pending streams due to MAX_CONCURRENT_STREAMS, we see the following error:
```
io.netty.handler.codec.http2.Http2Exception$StreamException: Maximum active streams violated for this endpoint.
at io.netty.handler.codec.http2.Http2Exception.streamError(Http2Exception.java:147)
at io.netty.handler.codec.http2.DefaultHttp2Connection$DefaultEndpoint.checkNewStreamAllowed(DefaultHttp2Connection.java:896)
at io.netty.handler.codec.http2.DefaultHttp2Connection$DefaultEndpoint.createStream(DefaultHttp2Connection.java:748)
at io.netty.handler.codec.http2.DefaultHttp2Connection$DefaultEndpoint.createStream(DefaultHttp2Connection.java:668)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionEncoder.writeHeaders0(DefaultHttp2ConnectionEncoder.java:201)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionEncoder.writeHeaders(DefaultHttp2ConnectionEncoder.java:167)
at io.netty.handler.codec.http2.DecoratingHttp2FrameWriter.writeHeaders(DecoratingHttp2FrameWriter.java:53)
at io.netty.handler.codec.http2.StreamBufferingEncoder.writeHeaders(StreamBufferingEncoder.java:153)
at io.netty.handler.codec.http2.StreamBufferingEncoder.writeHeaders(StreamBufferingEncoder.java:141)
at io.grpc.netty.NettyClientHandler.createStreamTraced(NettyClientHandler.java:584)
at io.grpc.netty.NettyClientHandler.createStream(NettyClientHandler.java:567)
at io.grpc.netty.NettyClientHandler.write(NettyClientHandler.java:328)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702)
at io.netty.channel.DefaultChannelPipeline.write(DefaultChannelPipeline.java:1015)
at io.netty.channel.AbstractChannel.write(AbstractChannel.java:289)
at io.grpc.netty.WriteQueue$AbstractQueuedCommand.run(WriteQueue.java:213)
at io.grpc.netty.WriteQueue.flush(WriteQueue.java:128)
at io.grpc.netty.WriteQueue.drainNow(WriteQueue.java:114)
at io.grpc.netty.NettyClientHandler.goingAway(NettyClientHandler.java:783)
at io.grpc.netty.NettyClientHandler.access$300(NettyClientHandler.java:91)
at io.grpc.netty.NettyClientHandler$3.onGoAwayReceived(NettyClientHandler.java:280)
at io.netty.handler.codec.http2.DefaultHttp2Connection.goAwayReceived(DefaultHttp2Connection.java:236)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder.onGoAwayRead0(DefaultHttp2ConnectionDecoder.java:218)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder$FrameReadListener.onGoAwayRead(DefaultHttp2ConnectionDecoder.java:551)
at io.netty.handler.codec.http2.Http2InboundFrameLogger$1.onGoAwayRead(Http2InboundFrameLogger.java:119)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readGoAwayFrame(DefaultHttp2FrameReader.java:591)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.processPayloadState(DefaultHttp2FrameReader.java:272)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readFrame(DefaultHttp2FrameReader.java:160)
at io.netty.handler.codec.http2.Http2InboundFrameLogger.readFrame(Http2InboundFrameLogger.java:41)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder.decodeFrame(DefaultHttp2ConnectionDecoder.java:174)
at io.netty.handler.codec.http2.Http2ConnectionHandler$FrameDecoder.decode(Http2ConnectionHandler.java:378)
at io.netty.handler.codec.http2.Http2ConnectionHandler.decode(Http2ConnectionHandler.java:438)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1486)
at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1235)
at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Unknown Source)
```
The bug should come from the way that `StreamBufferingEncoder.writeHeaders()` handles the condition `connection().goAwayReceived()`. The current behavior is to delegate to `super.writeHeaders()` and let the stream fail, but this will end up with `Http2Exception` with the message "Maximum active streams violated for this endpoint" which is horrible. See e5951d46fc/codec-http2/src/main/java/io/netty/handler/codec/http2/StreamBufferingEncoder.java (L152-L155)
Modification:
Abort new stream immediately if goaway received *and* MAX_CONCURRENT_STREAM reached in `StreamBufferingEncoder` rather than delegating to the `writeHeaders()` method of its super class.
Result:
In the situation when GOAWAY received as well as MAX_CONCURRENT_STREAM exceeded, the client will fail the buffered streams with `Http2Error.NO_ERROR` and message "GOAWAY received" instead of "Maximum active streams violated for this endpoint".
Co-authored-by: Norman Maurer <norman_maurer@apple.com>
Motivation:
We also need to ensure that all the header validation is done when a single header with the endStream flag is received
Modifications:
- Adjust code to always enforce the validation
- Add more unit tests
Result:
Always correctly validate
